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FL I. D m on D... on 0 Agricultural Caldron.

Patented July 7, 1868.

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Letters Patent No 79,685, :dated July 7, 1868.

IMPROVEMENT IN AGRICULTURAL BOILERS.

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TO ALL WHOM IT MAY CONCERN Be it knownthat I, DANIEL R. PnINDLE, of East Bethany, in-the county of Genesee, and-'State'of New York, have invented an Improved Agricultural Caldron and'St'eamer; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings; making part of this speeification-- Figure 1 being a central, vertical section of the caldron.

Figure 2, atop view thereof. 7

Figure 3, a central vertical section of a portion, showing a modification of the construction.

Figure 4, a vicwof a part detached.

Like letters designate corresponding parts in all of the figures.

The features of novelty in this invention, in addition to what 'are embraced in my former patents: for agricultural caldrons and steamers, are, first, the employment of a wooden cover, and the means devised for keeping it from shrinking and swelling and warpingi second,-the use of a swivelled or revolving elbow for thesteampipe; and, third, the mo de of attaching the flexible pipe-to the revolving elbow.

One feature of my invention consists in a construction by which I am enabled successfully to use a wooden cover, B, for the ealdron A. Heretofore it has been found impracticable to use wooden covers, which, if they could be used, would be desirable on account of their cheap'ness, lightness, and strength. The great difliculty in their use arises from their being alternately, or onoppositesides at the same time, exposed to great variations of temperature, and moisture or dryness, thereby warping and shrinking or'swelling out of proper shape.

The method by which I render the use of wooden covers practicable consists in keeping them covered with water. To accomplish this, a raised rim or flange, to surround the cover and contain su'fiici ent water for the -immersion thereof, is employed. There are two ways of applying this rim or flange. First, as represented infigs. land 2, where a raised rim, a,-is formed on the upper edgeof the-caldron A, of sufic'ient height to contain water to immersethe cover B. This-rim may also serve to receive the clamps 6 b, for fastening on the cover, as indicated in the drawings. There is'a ledge, 0, inside of the rim, for-the edge of the cover to rest on, and to receive the packing f under the cover. The other mode' of applying the raised flange is indicated in fig. 3, at a, and consists in attaching it to the edge of the cover itself. It maybe of lead, zinc, or any other suitable or desired material. The'caldron, in this case', must still have the ledge c, as shown, for the cover to rest and pack upon.

The cover has a metallic band, d, upon itsedge, ajs shown, or the clamps tobear on. It might be entirely lined with sheet metal, though this is not necessary. l

The steam-pipe G is screwed into the wooden cover. l3ut, to give greater security, it is preferable to attach also a metallic flanch or bush-nut, g, either secured to the-under side thereof, as shown, or to the upper side.

Another feature of my invention consists in connecting the flexible or shifting-pipe I with the stationary steam-discharge pipe G by means of a swivelled or turning elbow, H, which ma y.b e screwed upon the steampipe G, but must fit freely, so as to enable it to be turned to any direction req uired. This gives the flexible pipe I a horizontal direction at start, so that it is not liable to become kinked in bending down and in 'difi'erent directions. "Here it can, with the greatest ease, be turned to any direction for conveying steam, without any inconvenience whatever. The free-turning joint may-be packed or luted with any substance that'will tighten it, without causing it to stick and-impede the free revolution of the elbow. This freely-revolving. elbow is to be distinguished from the ordinary elbow-connection for sections of gas-pipe or waste-pipe, which are not capable of movement after being applied. It forms a special free-joint connection'between a flexible movable pipe and its immovable attachment, and thus enters into a new combination, with new capabilities and effects.

Another feature of my invention consists in the means of attaching the flexible rubber pipe tothe elbow H, as indicated in fig. 4. The barrel 1 of the elbow is made only large enough to receive the rubber pipe, with just sutlicientexpansion to hold it in place, without being enlarged in any place. This still ordinarily retain to compress it into the groove. This band may be elastic.

the flexible pipe upon ,the elbow, and yet allow it to be readily removed when required. But to secure it, in

case the pipe becomes stretched, I make a small groove, m, around the barrel l, into which the elasticity of the rubber pipe indents it; and, as a further security I use a compressing-band or clip. at, around the fiexiblepipe, 4

In order to prevent adhesion between the pipe and the elbow the latter should be polished smooth, or, preferably, galvanized or equivalently covered, or a lubricator, of oil, plumbago, or other"snbstance, may be employed. p 4

The filling-funnel is represented at D, and the 'valve at E. I They offer no special novelty in my present invention.

What I claim as my invention, and desire to'secure by Letters Patent, is-

The combination of the caldron A and cover B, so constructed as to enable the cover to be kept immersed in water; substantially as and for the purpose herein specified.

I also claim the revolving elbow H, in combination with the stationary steam-pipe G and flexible shiftingpipe I, for the purpose set forth. p

I also claim the mode of attaching the fieafiblc pipcto the elbow H, substantially as herein specified.

I also claim the metallic band d, on the edge of the wooden cover, in combination with the fastening-clamps, for the purpose set forth.

The above specification signed by me, this 20th day of March, 1868.

' DANIEL It. PRINDLE.

Witnesses:

N. F. MINER, D'. R. PRINDLE, Jr. 

